GPU Pro 5

216 II Lighting and Shading

Figure 6.4. Left: Original normals. Right: Normals by the time the wire goes sub-pixel,

assuming the viewer is to the right of the wire.

If sticking to Half Lambert is not enough, there are a few different approaches

for dealing with this. We have tried a couple of methods that both work rela-

tively well and can also be combined. Both involve fading over from our regular

lighting model into something uniformly colored over some distance before reach-

ing pixel size. The first method is simply computing our lighting as usual, then

computing the Half Lambert as well, and then fading between these two. In our

test scene a go